Hopefully this helps. It's been changed a bit recently to make it easier, and more apparent where you're supposed to go. So it might look a bit different for you, but the path is the same. The hard part about that wall run/jump is that you need to jump off the wall when you're as high up on the wall as possible, otherwise some height is lost.

Turns out my biggest problem had textures at 1/8x quality and that caused the hints not to render. Radeon HD 7770 w/ linux open source drivers. My mistake, back up to 1x now and everything is good in the world